public class EX5_2 {
    public static void main(String[] args) {
        Student s1 = new Student("Zhangsan", "Male", "102A");
        Student s2 = new Student("Lisi", "Female", "108S");
        s1.show();
        s1.showID();
        s2.show();
        s2.showID();
    }
}
